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Abstract
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Road congestion and traffic-related pollution have a large, negative social
and economic impact, and we believe many of these problems can
be reduced through the monitoring, distribution and processing of
traffic information. In this work we leverage existing sensor infrastructures as well as traveling vehicles in order to capture and propagate traffic information in an urban setting. We formulate the traffic data acquisition problem and explore solutions in bot the stationary and mobile sensor network domains, while considering realistic application requirements. We provide data dissemination algorithms that are frugal in the use of the wireless medium, rendering our system interoperable with the proliferation of competing applications. 